I'm playing a Stalker and I stopped soon after I got Neera (her voice acting kinda sucks).
Then I checked out the Black Pits and noticed I could buy a Shield Amulet very soon there, meaning a Kensai might actually be doable. Also, I tested a Shapeshifter and while it seems like it would breeze through BG1 like there was no tomorrow, Single Weapon Style seems to have no effect on claws.